| 摘要 |
PURPOSE:To improve the safety of a working car by installing the mechanism for automatically switching the speed change gear staying in the high speed back gear pistion for higher than a specified speed to the low speed back gear position, on the basis of the detected information of the inclination of the car larger than a specified angle given from the mechanism for detecting the longitudinal inclination of a car body. CONSTITUTION:A travelling speed change gear 13 is composed in such a way that a travelling system input shaft 20 is connected to the output shaft 15 of the main clutch 14 connected to an engine 3 through an advance/retreat switching mechanism 33, and a hydraulic sub-change-gear 24 for high/low speed switching and a gear system main change gear 25 are installed onto the shaft 20. In this case, the mechanism 34 for detecting the retreat state is installed onto the switching mechanism 33, and the mechanism 35 for detecting the high-speed travelling state of the subchange-gear 24, the mechanism 36 for detecting the engine revolution number below a specified number of revolution, and the mechansim 37 for detecting the longitudinal inclination of a car body larger than a specified angle are installed. Further, is installed the mechanism 38 for automatically switching a control valve V to the low-speed travelling state on the basis of the output of the detecting mechanisms 34, 35, and 37. |
